How many moles of aluminum ions are there in 0.2 moles of aluminum sulfate

How many moles of aluminum ions are there in 0.2 moles of aluminum sulfate

0.2×2＝0.4mol

A m + BN → CW + de 20 g m 10.5 g n reacts completely to form 16.5 g e. the molar mass ratio of m to W is ()
A,10a:7c B,7a:10c C,10c:7a D,7c:10a

According to the law of conservation of mass, W is 20 + 10.5-16.5 = 14g
It can be assumed that a mole of M reacts with B mole of n to produce C mole of W and D mole of E
So the mass of M is 20 g / A, and the mass of W is 14 g / C
The molar ratio of m to W is 20 / A / 14 / C = 10C / 7a
It should be c

It is known that an organic compound contains carbon, hydrogen and oxygen, and their mass ratios are 12:3:8 respectively. The molar mass of the organic compound is 46g / mol. the chemical formula of the organic compound is obtained

Suppose it is 1mol, so 12x: Y: 16Z = 12:3:8
So 12x + y + 16Z = 46,
So x: Y: z = 2:6:1
Therefore, the chemical formula of the organic compound is c2h6o1, which is ethanol

Who is bigger than aluminum and lead of equal mass

V=M/p
V Al / V Pb = (M / Al) / (M / P Pb) = P Pb / P al > 1
Aluminum is bulky